HOW TO KNOW THE BUTTERFLIES ing spines branched like the others. The ground color of the body is yellowish or pale brown, with two dark stripes along each side and usually a more or less dark stripe along the back. The spiracles are marked with orange. Food-plants.—Various species of passion-flowers. On wings that are longer and more slender than those of other fritillaries does this one flit above the flowery fields of the Gulf States. It comes as far north as southern Virginia ; and the Pacific Ocean only limits its southward range in the West. In ground color it resembles the monarch more than it does the fritillaries. It is true that it bears the silver beneath the hind wings, but this is in the form of bars rather than coin. The bril¬ liant glittering orange red of the upper surface of the wings makes it a fit companion for subtrop¬ ical flowers. When one sees this bit of animated sunshine one involuntarily wonders whether the earlier stage spent in consuming the leaves of the passion-flower has aught to do with the ardent color of the butterfly. But this is idle specula¬ tion rather than natural history. The species occurs from New Jersey and Penn¬ sylvania southward, also in Arizona and Califor¬ nia. 108